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Topaz
Topaz

Lazurite
Lazurite



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Lazurite

Topaz and Lazurite Physical Properties

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1 Physical Properties
1.1 Tenacity
Not Available
Brittle
1.2 Solubility
Not Available
Soluble
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.49-3.572.75
Amber
1 7.18
1.5 Fracture
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle
1.6 Cleavage
[001] Perfect
Imperfect on {110}
1.7 Mohs Hardness
85.5
Amber
2 10
1.8 Chemical Composition
Al2SiO4(F,OH)2
(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.

Topaz and Lazurite Chemical Formula

While comparing Topaz and Lazurite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Topaz and Lazurite chemical formula.

  • Chemical formula of Topaz- Al2SiO4(F,OH)2
  • Chemical formula of Lazurite- (Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.

Topaz and Lazurite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Topaz and Lazurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Lazurite Optical Properties during the identification of gemstone. Specific gravity of Topaz is 2.75 whereas that of Lazurite is 2.75.